spawn male reader x high school dxd

What if spawn was in high school dxd what if he was a sacred gear from malebolgia y/n a teenager that loved his girlfriend rias he and her loved each other so much well until issel showed up rias was giving him more attention she did not care about y/n no more because issel had the most powerful sacred gear ever rias broke up with y/n he was pissed he wanted revenge for her betrayal not until malebolgia he have y/n his sacred gear his own castle and army of demons and human devils and now with his new power he wants to rule the rest of hell and kill rias